We found this circuit in a Popular Electronics of the 90s. The circuit can be easily mounted today, as the components are common. The SCR can be the TIC106.
This configuration, from the 1977 National Semiconductor FET Databook, can be applied to other...
This circuit is from a 1972 German magazine Funkshau. The circuit can use BC548 transistors...
This circuit amplifies RF signals up to more than 100MHz and can be used as a booster in...